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Keep an Encrypted Journal Entry
Encrypt personal writing so only you can read it back.
ログイン不要
Strong, standard encryption: AES-256-GCM with a key derived from your password via PBKDF2 (250,000 iterations, SHA-256). Each message uses a fresh random salt and IV.
The password is never stored or sent anywhere — everything runs in your browser. If you lose the password, the message cannot be recovered. Share the encrypted text and the password through separate channels.
journaling tips
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Paste a private entry, encrypt it with a memorable password, and store the ciphertext anywhere.
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Decrypt it later here by pasting the text and entering the same password.
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Use a strong, memorable passphrase — long word combinations beat short complex ones.
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Your writing stays on your device.
使い方
1
入力
Enter your data into the tool above. Everything stays local to your browser.
2
処理
The tool processes your data instantly in your browser using JavaScript. No server, no waiting.
3
ダウンロード
Get your result instantly. Nothing is stored after you leave the page — complete privacy.
なぜ私たちのツール？
✓完全に無料 — 隠れたコストは永遠にありません
✓アカウント、メール、ログイン不要
✓ファイルがデバイスを離れることはありません
✓ファイルサイズの制限は一切ありません
✓出力に透かしなし